Word: billionths
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Dates: during 1930-1939
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Although this still is many thousands in a small space it is low enough-as compared with previous evacuations-for a laboratory man to become ecstatic." The pressure obtained is equivalent to one hundred-millionth of a millimetre of mercury, which is not far from one hundred-billionth of atmospheric pressure...
...operation, the metal to be melted is placed in the crucible, and an air tight cylindrical hood, about 10 inches in diameter by 15 inches in height, is placed over all the parts. By a powerful vacuum pump, the pressure under the hood is reduced to about one billionth of ordinary atmospheric pressure...
...more interesting contributions to the important and already broadly extended research into what makes vegetation grow. It is estimated that one ounce of active plant hormone would stimulate enough vegetation to girdle the earth at the equator. Researchers can now detect the effect on one plant of one ten-billionth of a gram of hormone. No subject has excited plant physiologists more than this in the past decade, and it has seen its major development in the last five years. Yet it was foreshadowed a half century ago by Julius von Sachs, a brilliant German who reasoned that roots...
Four hours after eating a big slice of "an ordinary culinary onion of domestic growth, of medium size and fairly pungent.'' every quart of Dr. Haggard's breath contained one-billionth of an ounce of onion oil (allyl propyl disulfide). "The odor was still detectable by the sense of smell...
...attacked the orthodox teaching of physics that electric current is a flow of matter having mass. A current of one ampere is a flow of 6,281 billion billion electrons per second past a given point. An electron is a particle of matter weighing 0.8999 billionths of a billionth of a billionth of a gram. But was electric current tangible...